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Finding the Fourth Proportional to 84,235.74, 126,353.10 and 21,055.55

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Solution

The fourth proportional to 84,235.74, 126,353.10 and 21,055.55 is: 31,583.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,235.74 : 126,353.10 = 21,055.55 : x
  2. Step 2: Convert to fraction form
    84,235.74/126,353.10 = 21,055.55/x
  3. Step 3: Cross multiply
    84,235.74x = 126,353.10 × 21,055.55
  4. Step 4: Simplify right side
    84,235.74x = 2,660,434,014.71
  5. Step 5: Solve for x
    x = 2,660,434,014.71/84,235.74
  6. Step 6: Final answer
    x = 31,583.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.